How must the markings on an LP-gas motor/mobile fuel container installed on a vehicle be visible?

The markings on an LP-gas motor/mobile fuel container installed on a vehicle must be visible directly or with the aid of a portable lamp and mirror. This requirement ensures that the markings provide essential safety information, such as the type of fuel and handling instructions, to anyone who may need to read them during operation or in the case of an emergency.

Visibility through a portable lamp and mirror means that even in low-light conditions or from different angles, individuals can still access the important information on the markings. This is vital for safety compliance and helps ensure that proper procedures can be followed while handling the LPG.

In contrast, other methods of making markings visible may not meet the comprehensive safety standards set forth in the NFPA 58 code because they might limit visibility or only allow it under certain conditions that do not effectively serve the necessary safety and operational needs. For instance, a transparent cover could potentially obstruct visibility instead of enhancing it, while markings visible only from the driver's seat would not be readily accessible to emergency responders or personnel who may need to interact with the LP-gas system. Special reflective paint might improve visibility at night but does not guarantee that the markings can be read from various angles when needed.